Pityriasis Rosea-Like Eruption by Covid-19 Infection: A New Case Report

Background: Coronavirus disease (Covid-19) becomes a pandemic worldwide in 2020. Different dermatological manifestations associated with Covid-19 infection like maculopapular, morbilliform, urticarial, vesicular, chilblain-like, petechiae, purpura, and livedoid rashes. Pityriasis rosea (PR) and PR-like eruptions were recently reported to increase in coronavirus cases. Aim: To evaluate and review the literature on PR and PR-like eruption associated with Covid-19 disease. Case Report: A 24-year-old female patient presented with a history of asymptomatic PR-like eruption that started during infection with the Covid-19 virus and resolved spontaneously over 14 weeks without therapy. Conclusion: PR and PR-like eruptions are not uncommon with Covid-19 disease and could be the early manifestation of SARS-CoV-2 virus infection.

红景天及红景天苷对低氧状态下脐静脉内皮细胞增殖及表达的影响

目的:探讨红景天及红景天苷对低氧状态下脐静脉内皮细胞增殖及表达的影响。方法:培养人脐静脉内皮细胞,并将其分为正常氧对照组、低氧对照组、低氧红景天组、低氧红景天苷组。采用CCK8法比较不同干预时间和质量浓度下的细胞增殖情况,采用SYBR Green实时定量聚合酶链式反应法检测mRNA的表达水平,采用Western Blot法检测蛋白表达水平。结果:低氧状态下,红景天和红景天苷均可促进细胞增殖。当红景天培养液质量浓度为10μg/ml、干预时间为24 h时,红景天对细胞的促增殖作用最显著。低氧对照组、低氧红景天组、低氧红景天苷组细胞的肾上腺髓质素和降钙素受体样受体的mRNA、蛋白表达明显高于正常氧对照组,且低氧红景天组、低氧红景天苷组明显高于低氧对照组,低氧红景天组明显高于低氧红景天苷组,差异均有统计学意义(P<0.05)。结论:红景天可促进细胞增殖,促进肾上腺髓质素和降钙素受体样受体的mRNA、蛋白表达,而红景天苷是红景天该作用的重要但非唯一有效成分。

低氧状态下红景天通过上调缺氧诱导因子1α促进人脐静脉内皮细胞肾上腺髓质素及其受体的表达

目的探讨低氧状态下红景天对人脐静脉内皮细胞(human umbilical vein endothelial cells,HUVECs)中肾上腺髓质素(adrenomedullin,ADM)、降钙素受体样受体(calcitonin receptor-like receptor,CRLR)、缺氧诱导因子1α(hypoxia-inducible factor 1 alpha,HIF-1α)表达的影响以及这一过程中HIF-1α的调控作用。方法 HUVECs常规培养并设立正常氧、低氧对照组和低氧红景天组。CCK8法观察低氧状态不同浓度红景天干预不同时间的促细胞增殖作用;实时定量PCR和Western blot法测定ADM、CRLR、HIF-1α基因表达的情况;通过小干扰RNA方法敲低HIF-1α基因,实时定量PCR和Western blot法检测ADM、CRLR基因表达的变化。结果红景天促进低氧状态下HUVECs增殖,促进低氧状态下内皮细胞ADM、CRLR以及HIF-1α的表达,HIF-1αsiRNA可以显著抑制红景天对ADM及CRLR表达的促进作用。结论低氧状态下红景天通过上调HIF-1α促进HUVECs ADM及其受体CRLR的表达。